Fuses & Circuit Breakers

Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

Fuses

Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

Circuit breakers

Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

Circuit Breakers
Circuit Breakers
Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuses
Fuses

35151 Products showing for Fuses & Circuit Breakers

276 of 999+
Temporarily out of stock
Phoenix Contact Surge Protector, 32A, 1000V dc
  • RS Stock No. 518-127
  • Mfr. Part No. 1283679
Each
$590.49(exc. GST)
Currently unavailable
Wickmann 7A Resettable Fuse, 6V dc
  • RS Stock No. 174-0330
  • Mfr. Part No. 2920L700SLPR
1 Reel of 2000
$6,532.31(exc. GST)
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 800A Ekip G Touch LSIG, 3 channels
  • RS Stock No. 259-9901
  • Mfr. Part No. 1SDA070747R1
Each
$16,261.75(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 4 channels
  • RS Stock No. 259-3685
  • Mfr. Part No. 1SDA071658R1
Each
$26,390.60(exc. GST)
In Stock
nVent ERIFLEX ERIFLEX Busbar, 20mm Pitch
  • RS Stock No. 277-6087
  • Mfr. Part No. 549200
Each (In a Pack of 4)
$140.935(exc. GST)
Unavailable
Schneider Electric ComPact Trip Unit for use with Compact NSX 100/160/250 circuit breakers
  • RS Stock No. 221-0929
  • Mfr. Part No. LV429116
Each
$3,080.06(exc. GST)
Temporarily out of stock
Eaton NZM Circuit Breaker for use with Circuit Breaker
  • RS Stock No. 246-890
  • Mfr. Part No. 192287 NZMN3-4-PX400/VAR-TAZ
Each
$11,574.56(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4686
  • Mfr. Part No. 3VA2163-0HL42-0AA0
Each
$3,394.59(exc. GST)
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 3 channels
  • RS Stock No. 259-9871
  • Mfr. Part No. 1SDA070701R1
Each
$8,226.54(exc. GST)
Temporarily out of stock
Eaton Moeller IZMX Electronic Circuit Breaker 5kA IZM63, Withdrawable
  • RS Stock No. 262-844
  • Mfr. Part No. 303669 IZM63H4-V50W-1
Each
$143,285.12(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-3612
  • Mfr. Part No. 1SDA071588R1
Each
$22,562.00(exc. GST)
Temporarily out of stock
Eaton xEnergy Main Distribution Board
  • RS Stock No. 258-217
  • Mfr. Part No. 289174 XPNBCB0402
Each
$178.27(exc. GST)
Temporarily out of stock
Eaton IZMX/INX Phase Barrier for use with INX16…, IZMX16…
  • RS Stock No. 132-604
  • Mfr. Part No. 184131 IZMX-IB163-1
Each
$139.76(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4045
  • Mfr. Part No. 3VA2110-8KQ32-0AA0
Each
$5,095.79(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Dip LSI, 4 channels
  • RS Stock No. 259-3534
  • Mfr. Part No. 1SDA071512R1
Each
$15,534.84(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-3634
  • Mfr. Part No. 1SDA071608R1
Each
$24,755.05(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4503
  • Mfr. Part No. 3VA2125-0HM46-0AA0
Each
$4,266.03(exc. GST)
Temporarily out of stock
ABB Accessories MS116/MS132 3 Phase Busbar, 690V ac
  • RS Stock No. 259-5995
  • Mfr. Part No. 1SAM201916R1114
Each
$61.23(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-3473
  • Mfr. Part No. 1SDA071428R1
Each
$19,590.73(exc. GST)
In Stock
RS PRO 2.5A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-564
Each (In a Pack of 10)
$1.041(exc. GST)
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